Subject: Invisible light rays penetrating the atmosphere

I have been swimming in the same pool for fiev years during the summer.  I 
always wear blue tinted goggles.  This is the first year that when I see the 
light refracted at the bottom of the pool I see shades of red.  Is there an 
increase of an invisible light that is getting through?  If so what type?

Re: Invisible light rays penetrating the atmosphere